Siemens SIMATIC IPC477E PRO Operating Instructions Manual page 41

NOTICE
Damage through regenerative feedback
Regenerative feedback of voltage to ground by a connected or installed component can
damage the device.
Connected or built-in I/Os, for example, a USB drive, are not permitted to supply any voltage
to the device. Regenerative feedback is generally not permitted.
SIMATIC IPC477E PRO
Operating Instructions, 08/2024, A5E39912462-AF
Mounting and connecting the device
4.4 Connecting the device
41